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研究了光纤布拉格光栅的封装及其布设工艺,以及封装后的传感理论,提出并实现了一种光纤布拉格光栅的封装工艺,即用导热性能良好的紫铜片对光纤布拉格光栅进行封装,这种封装结构简单小巧。通过实验对裸光栅和封装后光纤布拉格光栅的温度传感特性进行了研究。研究表明:经过紫铜片封装的光纤布拉格光栅,其温度灵敏系数比裸光纤光栅的提高了2.94倍,有助于提高解调设备的温度分辨率,可以探测到0.03℃的温度变化,且重复性好;该封装结构利用了紫铜的耐腐蚀性,适用于分布式传感网络,便于工程应用。
The fiber Bragg grating packaging and its deployment technology, as well as the sensing theory after packaging, the fiber Bragg grating packaging process is proposed and implemented, that is, with good thermal conductivity copper fiber Bragg Grating package, this Package structure is simple and compact. The temperature sensing characteristics of bare grating and packaged fiber Bragg grating are studied through experiments. The results show that the temperature sensitive coefficient of fiber Bragg grating encapsulated by copper foil is 2.94 times higher than that of bare fiber grating, which helps to improve the temperature resolution of the demodulation device, detect the temperature change of 0.03 ℃, and the repeatability Good; The package structure uses the corrosion resistance of copper, suitable for distributed sensor networks, easy to engineering applications.